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Data Papers on Price indices

Understanding Commercial Property Price indexes
Mick Silver, World Economics, September 2013
The type of database used for the measurement of commercial property price indexes (CPPIs) dictates the potential weaknesses in the resulting indexes and limitations of the methods available for measuring the indexes. Two major types of data are appraisals of the value of properties and recorded transaction prices. The former is based on expert judgement and may have problems of smoothing and lagging transaction prices. The latter is based on actual transactions and may have sample selectivity bias and limited sample sizes for these heterogeneous properties. These issues are examined.
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Currency Valuation and Purchasing Power Parity
Jamal Ibrahim Haidar, World Economics, September 2011
This paper aims to highlight key limitations of The Economist magazine’s Big Mac Index (BMI). The Economist markets the BMI as a tool to determine valuation of currencies. This paper shows that the BMI is a misleading measure of currency valuation for economies whose markets are structurally different from the benchmark currency countries.
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The Power of Price Indexes: And how to use them to steal a hundred billion dollars, seriously underestimate Japanese growth for 20 years and escape easily from debt
Raymond Cheung and Mike Waterson
World Economics, March 2011
Price indexes are the most important of all economic indicators simply because they are the tool used to calculate the real size, speed and direction of all forms of economic activity. Price indexes are compiled almost everywhere, but with major differences in method and sampling procedures. Some methods and procedures have led to significant errors. Even in the case of a country as advanced as Japan, critics have calculated that imperfections in method have led to a rate of price inflation around 1.8% per year above the level a true cost of living index would have shown. Further research undertaken by World Economics has attempted to make estimates for changes in discounting and promotional practices at the retail level. The conclusion is that, in reality, the overestimation of price changes by the Japanese CPI in recent years may well have been in excess of 2% per annum, and could have been significantly more. Different CPI assumptions change economic growth estimates dramatically. Using World Economics estimates, adding in a minimum figure for marketing and retail changes seen in recent years suggests, contrary to official data, that Japanese consumption growth exceeded that of the US.
What a Consumer Price Index Can’t Do
Ralph Turvey, World Economics, September 2004
A monthly consumer price index traces changes in the monthly cost of a year’s consumption using a sample of prices. But in some months the prices that can be sampled will temporarily exclude some of the products that were bought in the base year, Christmas trees providing a textbook example. Worse still, it becomes permanently impossible to observe prices for sampled products that have been completely superseded. There are methods for dealing with these two problems, but they leave serious and irremediable defects in the index.
Measuring Consumer Inflation in the United Kingdom: Recent developments and the future outlook
David Fenwick, World Economics, March 2003
Responding to Mick Silver’s proposals regarding the RPI, David Fenwick of the ONS summarises some of the issues that confront compilers of price indices.
Some Proposed Methodological Developments for the UK Retail Prices Index
Mick Silver, World Economics, March 2003
The Retail Prices Index (RPI) is one of the UK’s most important macroeconomic indicators, as well as being used for indexation/adjustments for inflation to wages and benefits. This paper argues that the dynamic changes in product markets and consumers’ responses to price changes need to be incorporated into the RPI if it is to effectively measure changes in the cost of living. The quite positive and innovative work undertaken by the Office for National Statistics (ONS) is acknowledged. However, the basis of the RPI, in measuring the price changes of a matched, fixed basket of goods, is considered inappropriate to modern markets. Some proposals are made.
Owner-occupiers and the Price Index
Ralph Turvey, World Economics, September 2000
The treatment of owner-occupied dwellings in Consumer Price Indexes varies between countries and is the subject of continuing controversy. Ralph Turvey explains the alternative possible treatments and reasons for disagreement.


Keywords: CPI, HICP, Inflation, Prices, RPI     Download Paper
From Big Macs to iMacs: What do international price comparisons tell us?
Jonathan Haskel & Holger Wolf, World Economics, June 2000
The authors review recent international price comparisons to examine the veracity of claims about “rip-off Britain”. They reach three conclusions. First, methodologically, the data requirements for a meaningful price comparison are very demanding and most of the evidence does not meet these standards. Second, price differences within countries seem, in many cases, to be just as high if not higher than price differences between countries. Third, for most goods, the difference between the UK and the rest of the EU seems to be minor relative to the difference between the EU and the United States. The real puzzle is the comparatively high prices in the EU.